A reflex test of the knee is the basis for the term knee-jerk reaction.. A knee-jerk reaction is typically impulsive in nature and doesn't allow for someone to think things through. An outburst of anger is an example of a knee-jerk reaction.
As Figure 1 shows, the central processing unit consists of two parts: The control unit and the arithmetic/logic unit. Each part has a specific function. Before we discuss the control unit and the arithmetic/logic unit in detail, we need to consider data storage and its relationship to the central processing unit.
Save. Image by Flickr.com, courtesy of Blake Patterson. Virtually all computers, from home desktop machines to giant research systems, all share a basic structure. They have a central processor that computes and performs logic, memory that holds data, and input-output devices.entral Processor. A computer's central processing unit (CPU) is its active brain.. It performs arithmetic, compares data, and moves data to and from the other parts.